Steam-generator



(No Modl.)

J. S. WOOLSEY.

STEAM GENERATOR.

Patented Sept. 13,1881.

UNITED STATES PATENT OFFICE,

JOHN S. WOOLSEY, OF GILROY, CALIFORNIA.

STEAM-GENERATOR.

SPECIFICATION forming, part of Letters Patent No. 246,990, dated September 13, 1881.

Application filed April 19, 18L (No model.)

To all whom it may concern:

Be it known that I, JOHN S. WooLsEY, of Gilroy, county of Santa Clara, State of California, haveinvented Improvements in Steam- Generators; and I hereby declare the following to be a full, clear, and enact description thereof.

My invention relates to the class of steam generators, and more especially to certain improvemen ts therein, consisting in the combination of a central-pipe generator with afurnace having a contracted central grate-space.

Referring to the accompanying drawings, Figure 1 is a perspective view of my generator. Fig. 2 is a vertical section. Fig. 3 is a horizontal section. Fig. 4 is a detail of construction.

Let A represent the casing or shell or furnace-casing of the boiler; B, the ash-pit; C, the smoke-stack. Upon the top of the furnacecasing, and secured thereto in any practicable manner, is the steam -chamber D. It can be made of any shape; but in order to dispense with all braces and stays, and yet obtain the required strength, I here make it globular, consisting of a single or two piccesbolted togethcr. It is made of cast metal, at small expense, as is also the furnace-casing.

Attached to the lower end of the steam chamber D is a tube or pipe, E, secured thereto in any practicable manner. Its lower end is closed, and it extends down within the shell a considerable distance toward the floor or bottom F of the furnace. This tube E is tapped over its surface and the small tubes G inserted, the outer ends of which are closed, as shown. They radiate in all directions from the central tube, E, toward the furnace-casing A, and are in sufficient numbers to almost till the space between the tube E and casing. The water fills the tube E and all the smaller tubes G, and thus presents a large surface to the action of the heat and generates steam rapidly.

In order to obtain a great heat, I have constructed the bottom of the furnace and grate as follows: The bottom or floor F is all closed, except an aperture, 0, in its center, of about one-third or less the diameter of the floor.

This comparatively small opening is occupied by the small grate H. The fuel is to be placed upon the grate. A strong draft will be thus created, and cause a more perfect combustion of the fuel, and produce a flame the intensity of which is the result of the contracted dimensions of the grate-opening and consequent force of the draft. This flame, on account of the perfect combustion of the fuel, will be almost white and very hot. It will be directed and expanded by the strong draft up among the tubes G, and cause the water in them to become hot very rapidly.

By this construction I need use but little fuel, on account of the perfect combustion, and by concentrating it directly over the strong draft can obtain a very intense heat upon the water-tubes. When any of the small tubes G become stopped up, or otherwise require attention, they can be unscrewed from the central tube,E, and replaced, or others substituted.

I represents a tube connected with the waterspace for drawing off the water when necessary.

J represents the steam and water gage, or the pipe to which the steam and water gage may be connected.

In order to furnish water to the boiler, I have provided a water-reservoir, K, of the usual well-known form, and supported above and to one side of the steam chamber or dome, as shown. Its upper end is connected with the steam-chamber by a pipe, L, furnished with a stop-cock, (1. Its lower end is connected by a pipe, M, with the pipe J, and through it with the water-space in the tube E. The pipe M is provided with a stop-cock, b.

N represents'the pipe connecting with the water-source, and is furnished with a cock, 0. The water-source will be placed high enough to insure the filling of the reservoir K with water.

P represents a hinged door, whereby access can be readily obtained to the interior of the shell or furnace-casing. Q is the opening to admit the fuel. ltis the pipe leading from the steam chamber D to the engine or other outlet.

Having thus described my invention, what I substantially as and for the purpose herein. de- 10 claim as new, and desire to secure by Letters scribed.

Patent, is In witness whereof I have hereunto set my In a steam-generator having a shell, A,and hand. steam-chamber D, the combination of the cen- JNO. S. WOOLSEY.

trai pipe or tube, E, with its radiating tubes G, and the furnace bottom or floor F, having Witnesses:

a contracted grate-opening, e, as shown, with S. H. NOURSE, a grate, H, of dimensions to fit said opening WM. F. BOOTH. 

